Ключевые слова: action, active, adult, caucasian, challenge, compete, competition, endurance, exercise, exercising, fitness, health, healthy, jogger, jogging, leisure, life, lifestyle, male, man, marathon, motion, movement, mud, race, river, run, runner, running, speed, splash, splashing, sport, sports, stream, streambed, trailrunning, training, water, white, workout,